Portable large-flow liquid type biological aerosol cyclone sampler

Abstract

The invention discloses a portable large-flow liquid type biological aerosol cyclone sampler which comprises a large-flow fan, a cyclone sampling tube, a sampling centrifugal tube and a power supply.The main body of the cyclone sampling tube is cylindrical, and the lower part of the cyclone sampling tube is conical funnel-shaped; an air inlet pipe is arranged at the upper part of the cyclone sampling tube; a filter screen is arranged at the outer end of the air inlet pipe; the large-flow fan is arranged at the top end of the cyclone sampling tube; the sampling centrifugal tube is connected with the bottom end of the cyclone sampling tube, and liquid sampling media are contained in the sampling centrifugal tube. Portable and efficient large-flow air collection is achieved through the large-flow fan, and meanwhile, the life activity of microorganism particles is guaranteed through the liquid sampling medium; secondary aerosolization and sampling liquid splashing losses are reduced; subsequent qualitative and quantitative analysis of biological aerosol is facilitated; and the sampler has a good application prospect in biological aerosol research.

Description

technical field [0001] The invention relates to a bioaerosol sampler, in particular to a portable large-flow liquid cyclone sampler and a sampling method, which can be widely used in the collection of particulate matter in indoor and outdoor ambient air, especially the rapid collection of bioaerosol particles . Background technique [0002] Air quality closely affects human life and health. Air fine particle pollution has become an important environmental problem facing human beings. Microbial aerosols composed of microbial particles have a crucial impact on public health and disease prevention and control. Many infectious diseases that have broken out in recent years and endanger public safety can be transmitted through bioaerosols, such as SARS and the new coronavirus COVID-19. In addition, issues of widespread public concern such as pollen allergies and respiratory infections are directly related to various bioaerosol particles in the air. Therefore, the research on bio...

AI Technical Summary

Problems solved by technology

However, the flow rate of the above types of samplers is too small to achieve rapid collection of bioaerosols. At the same time, solid impact and filter sampling will greatly damage the life activity of microorganisms. Therefore, the samples collected in the actual bioaerosol research Air samples have limited representation

In recent years, some large-flow bioaerosol particle samplers have been improved, such as solid impact RCS samplers and some samplers on the market based on the principle of cyclone centrifugation. There is still a lot of room for development in aspects and sample quantification: RCS traps particles based on the principle of solid impact, and the physical damage to microbial particles is more serious than that in the case of low flow rate; while some liquid samplers on the market are running. Secondary aerosolization is obvious, the sample loss is more, and the error of quantitative analysis is larger

In addition, although some solid impact samplers can achieve large flow collection, the collected biological samples are attached to the surface of the object, which cannot be well combined with biochemical analysis methods in subsequent detection

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